Black CUE screen, all is working without screen?

2016 CADILLAC ESCALADE ESV
80,000 MILES • 6.2L • V8 • 4WD • AUTOMATIC
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PAWEL_N
  • MEMBER
  • 178 POSTS
Hello,

My brother gave the car to a mechanic to fix the engine problem. But when he picked up the car, the CUE screen was not working. The mechanic did not know what had happened. There is a problem with CUE screen now. I can control all functions, all buttons are working, the digitizer (LCD touchscreen) is working, but I cannot see the screen view. The screen is black all the time. When I put reverse gear, I cannot see rear camera. I checked the second CUE screen. I do not know if it is okay, but it is black too. It is possible that 2 pcs of ECU are broken, but I think that it is a problem with the car. But what is not okay? What is faulty? What should I fix?
I am waiting for your help.
Have a nice day,
Pawel
Jul 27, 2023 at 6:41 PM
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STRAILER
  • Experienced Mechanic
  • 55,249 POSTS
Fuse Issue: One of the most common reasons for a black CUE screen is a blown fuse. Check the fuse box for any blown fuses related to the CUE system and replace them if necessary.

This guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Check out the images (below). Please let us know what happens.
Jul 29, 2023 at 6:13 AM
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PAWEL_N
  • MEMBER
  • 178 POSTS
Dear Ken,

Thank you for your reply. Your last solution was the answer. There was a Connectors Problem.
I remove the glove box and clean by contact spray all 3 units which go to CUE. Thay are on the left side.
After cleaning all junctions the CUE screen view appeared :-)
Thank you again,
Pawel
Jul 31, 2023 at 7:16 PM
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STRAILER
  • Experienced Mechanic
  • 55,249 POSTS
Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help. Can you please leave us a rating? (Copy entire link)

https://www.google.com/search?q=2carpros&gs_ivs=1#lrd=0x80dcd47364be5d0d:0xba091aa4209f4497,1,,,&tts=0

and

https://www.sitejabber.com/reviews/2carpros.com

Thank you in advance :)
Aug 1, 2023 at 3:24 AM
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